42240043331 has 2 divisors, whose sum is σ = 42240043332. Its totient is φ = 42240043330.

The previous prime is 42240043303. The next prime is 42240043379. The reversal of 42240043331 is 13334004224.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42240043331 is a prime.

It is a super-2 number, since 2×42240043331² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42240043331.

It is not a weakly prime, because it can be changed into another prime (42240043301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21120021665 + 21120021666.

It is an arithmetic number, because the mean of its divisors is an integer number (21120021666).

Almost surely, 2^42240043331 is an apocalyptic number.

42240043331 is a deficient number, since it is larger than the sum of its proper divisors (1).

42240043331 is an equidigital number, since it uses as much as digits as its factorization.

42240043331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 42240043331 its reverse (13334004224), we get a palindrome (55574047555).

The spelling of 42240043331 in words is "forty-two billion, two hundred forty million, forty-three thousand, three hundred thirty-one".